This is a great guide man, I also managed to change the governor for my 4 threads CPU with cpufreq-selector --cpu 0 -g powersave EDIT: You probably have more then one core so add that comand multiplied by threads: 4 threads = 4 comands and change them in order --cpu 0 then next one --cpu 1 and continue to reach number of cores or on Intel CPU's, threads ;)
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ZbunjeniNov 27 '14 at 0:07

EDIT: To change the GOVERNOR without sudo you need gnome applets. You can get them via terminal command: sudo apt-get install gnome-applets
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ZbunjeniNov 28 '14 at 13:02